added ignore ignore files

bower.json

@@ -3,6 +3,21 @@
   "version": "0.6.13",
   "description": "An advanced barcode-scanner written in JavaScript",
   "main": "dist/quagga.js",
+  "ignore": [
+    "build",
+    "doc",
+    "spec",
+    "src",
+    "tasks",
+    "test",
+    ".gitignore",
+    ".npmignore",
+    "Gruntfile.js",
+    "karma-integration.conf.js",
+    "karma.conf.js",
+    "package.json",
+    "test-main.js"
+  ],
   "devDependencies": {
     "async": "^0.9.0",
     "grunt": "~0.4.5",